What would be the value of a receiver switch? Will you have a separate receiver battery from the main motor battery? That can be done but is rare these days. Normally you run the motor and the receiver from the same battery. The receiver gets its power from the ESC or from a separate device that steps the voltage down.
Normally, with electrics, you put the battery in when you are ready to fly and you disconnect it when you are done so you can charge. So, what does the switch do?
BTW, if you switch off the receiver while you still have the motor battery in, that means that there is nothing controlling the motor while it is still powered. I would not recommend that.